It takes a bit of effort to open the Coleman. When empty you must hold the bottom down to get it to open. It is still stiff opening after 3 years of use.
I have an 5 Day Coleman Extreme from a few years ago. It's held up well. It lives in the back of my truck for bringing home cold and frozen groceries. Never did an extended time with it, but on a Yellowstone trip where we were cooling down 15 to 20 sodas equivalent of drinks a day we were only using at most 12 lbs of ice a day. Each night we replaced what we drank during the day. In the morning we drained the water, and added a 10# or 20# bag of new ice, possibly evicting enough old ice so that the whole new bag fit in. On the days following when we evicted ice we usually skipped getting ice. That ended up being every third to fourth day. Temperatures were in the mid to high 80s mid day, and the cooler went into the hotel at night so you can pretty much figure it averaged 75F exterior temperature. The cooler also sat in the bed of the pickup at the back in direct sunlight and the flow of the air when driving. Yeah, not a long term hot weather test, but it convinced me it was very good for most of my trip needs. I don't use my thermoelectric cooler any more. If it was just me on a trip, I'd get their smaller one that is more cube shaped. It would fit on the front passenger seat when I have the back of the 4runner setup for sleeping. I have one that looks to be the same size as the one they tested. I wish it didn't have the cup holders on top. They just thin the lid insulation some and reduce the inside height on that end.
I am thinking of getting a Yeti, but that would only be for bear reasons. They are IGBC rated bear resistant when locked shut. I seam to now be doing most of my camping in bear country and would prefer to keep the bruins and other critters from getting human food habituated.